Google Search Engine criteria?
Reasons your site may not be included despite search engine optimization services.
Your pages are dynamically generated. We are able to index dynamically generated pages. However, because our web crawler can easily overwhelm and crash sites serving dynamic content, we limit the amount of dynamic pages we index.
You employ doorway pages. Google does not encourage the use of doorway pages. We want to point users to content pages, not to doorways or splash screens.
Your page uses frames. Google supports frames to the extent that it can. Frames tend to cause problems with search engines, bookmarks, emailing links and so on, because frames don’t fit the conceptual model of the web (every page corresponds to a single URL). If a user’s query matches the site as a whole, Google returns the frame set. If a user’s query matches an individual page on the site, Google returns that page. That individual page is not displayed in a frame — because there may be no frame set corresponding to that page.
Additionally, Google does not like:
Hidden text or hidden links.
Stuffing pages with irrelevant keywords.